Magpie
4.7(23 reviews)

Rome's Hidden Gem: St. Clement's Underground Temples Tour

From€59
1 hour
Province of Rome, Italy

About this activity

Delve into Rome's rich history with a guided tour of St. Clement's Basilica's underground temples, uncovering layers of ancient civilization beneath the city streets.

Highlights

  • Explore ancient underground temples
  • Discover Rome's layered history
  • Access hidden archaeological sites
  • Learn from expert local guides
  • Experience a unique historical journey

Full description

Uncover the secrets of Rome's past with an exclusive small-group tour of St. Clement's Basilica's underground temples. Beneath the bustling city streets lies a hidden world of ancient structures, including a 4th-century basilica, a 2nd-century pagan temple, and a 1st-century Roman house. Led by expert guides, you'll journey through these subterranean levels, each revealing a different era of Rome's layered history. This unique experience offers a glimpse into the city's evolution, from its early days to its rise as a Christian center. Don't miss this opportunity to explore one of Rome's most intriguing and lesser-known sites, providing a fascinating perspective on the city's rich heritage.

Included / Excluded

  • Guided tour of St. Clement's Basilica's underground levels
  • Expert insights into Rome's layered history
  • Access to ancient temples beneath the basilica
  • Hotel pickup and drop-off

Itinerary

1

Embark on an unforgettable journey that begins at the breathtaking 12th-century basilica, where your expert guide will unveil the secrets behind the stunning golden mosaic in the apse, highlighting its spiritual significance. From there, descend 14 meters beneath the basilica to uncover the hidden 4th-century underground church, built directly on top of St. Clement's home, the third pope of Rome. Marvel at the early Christian frescoes, which depict the stories of martyrs and the struggles faced by the first Christians.
 Next, continue your descent to uncover one of Rome’s best-preserved Mithraic temples. This ancient treasure offers you a unique glimpse into the mysterious Mithraic cult, which thrived before the rise of Christianity. Let your guide bring this fascinating chapter of Roman history to life as they explain the cult’s intriguing rituals and beliefs. As you explore the site, you'll feel an eerie atmosphere, enhanced by an underground river that adds an element of mystery.

Duration: 1 hourAdmission: YES
2

For a more in-depth experience, you can add an optional visit to the Basilica di Santo Stefano Rotondo to your tour. In 45 minutes, you’ll discover this architectural gem, known for its unique circular design. Inside, you'll be captivated by the vibrant frescoes that adorn the walls, each depicting dramatic scenes of early Christian martyrs. These striking images vividly portray the courage and sacrifices of saints who endured extraordinary trials for their faith. As your guide shares the stories behind these powerful artworks, you’ll gain a deeper understanding of the devotion and struggles that shaped Rome’s religious heritage.

Duration: 45 minAdmission: NOT_APPLICABLE

Meeting point

Start Location

Unknown location

Important information

Know before you book

  • The tour is conducted in English; ensure you understand the language.
  • The meeting point is at St. Clement's Basilica; plan your arrival accordingly.
  • The tour involves walking through narrow and uneven passages; consider this when booking.

Know before you go

  • Wear comfortable walking shoes suitable for uneven surfaces.
  • Bring a bottle of water to stay hydrated during the tour.
  • Photography may be restricted in certain areas; please follow guide instructions.

Cancellation policy

Free cancellation up to 1 days before the activity starts

For a full refund, cancel at least 24 hours before the scheduled departure time.

Accessibility

  • Easy Public Transport
  • Infant Seats Available

Good to know

  • An appropriate dress-code is required in order to enter the churches: knees and shoulders should be covered
  • This tour is subject to weather conditions and/or liturgic-calendar events. If canceled you will be given the option of an alternative date or full refund
  • Photography and filming inside the basilica’s is not allowed
  • Your phone should be on put on silence before visiting the basilica’s
  • If you choose to extend your tour with the optional visit to Santo Stefano Rotondo, please note that the itinerary may vary. Depending on the schedule, you may begin your visit at Basilica San Clemente and proceed to Santo Stefano Rotondo, or vice versa. Therefore, also the ending point may vary
  • It is recommended to wear comfortable shoes as there is a moderate amount of walking involved and you will be walking many steps and stairs
  • Pets are not allowed inside the basilica’s
  • We recommend you to bring your own headphones in order to minimise plastic waste
  • The frescoes inside the Basilica di Santo Stefano Rotondo depict graphic scenes of martyrdom and may not be appropriate for children
  • Please note that the extended option with Santo Stefano Rotondo may occasionally be unavailable due to special events or liturgical celebrations

Traveler reviews

4.7
23 reviews
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1

So appreciated Francesca

It was so worth having a personal guide to walk us through all the fine details of this experience. Francesca (not sure if I had the spelling correct) covered every detail and was patient with our questions.

Kendall_SApr 24, 2026VIATOR

Don’t miss this tour!

First, don’t miss this church and all of its historic layers. Second, get a guide otherwise you will miss learning all of the details that make it so incredible. Third, our tour guide from Touriks was outstanding.

andreal6721Mar 5, 2026TRIPADVISOR

Key Roman Church Tour!

For church lovers in Rome, this tour should be the first thing they do! I gained so much new information from our excellent guide, Francesca. All the churches I visited after the tour were more meaningful because of what I learned on this tour. Excellent!

Karen_TOct 7, 2025VIATOR

Amazed at “depth” of history

Your website explains it perfectly. It’s tight in places, and it’s deep. Loved st. Clemente history.

Valerie_ROct 7, 2025VIATOR

Interesting experience underground

Interesting perspective on the lower levels beneath Rome. Chance to hear about snd view how people lived centuries ago. I think other people I know were able to go deeper than our guide offered.

Marsha_MSep 25, 2025VIATOR

Additional information

An appropriate dress-code is required in order to enter the churches: knees and shoulders should be covered This tour is subject to weather conditions and/or liturgic-calendar events. If canceled you will be given the option of an alternative date or full refund Photography and filming inside the basilica’s is not allowed Your phone should be on put on silence before visiting the basilica’s If you choose to extend your tour with the optional visit to Santo Stefano Rotondo, please note that the itinerary may vary. Depending on the schedule, you may begin your visit at Basilica San Clemente and proceed to Santo Stefano Rotondo, or vice versa. Therefore, also the ending point may vary It is recommended to wear comfortable shoes as there is a moderate amount of walking involved and you will be walking many steps and stairs Pets are not allowed inside the basilica’s We recommend you to bring your own headphones in order to minimise plastic waste The frescoes inside the Basilica di Santo Stefano Rotondo depict graphic scenes of martyrdom and may not be appropriate for children Please know that the extended option with Santo Stefano Rotondo is available on all days except Mondays since the church is closed on Mondays
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